#5B66E3#5B66E3

#5B66E3 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 57.0% C 0.187 H 275.0°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#5B66E3
RGB	rgb(91, 102, 227)
HSL	hsl(235, 71%, 62%)
HSV	hsv(235, 60%, 89%)
CMYK	cmyk(59.9%, 55.1%, 0%, 11%)
CIE-LAB	lab(48.60, 32.80, -65.08)
CIE-LCH	lch(48.60, 72.88, 296.75°)
OKLab	oklab(56.98% 0.0162 -0.1868)
OKLCH	oklch(56.98% 0.187 275)
XYZ	xyz(22.9264, 17.2711, 74.7837)
Luminance	0.1727 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66E3 #E3D85B

analogous

#5BAAE3 #5B66E3 #945BE3

triadic

#5B66E3 #E35B66 #66E35B

tetradic

#5B66E3 #E35BAA #E3D85B #5BE394

square

#5B66E3 #E35BAA #E3D85B #5BE394

split-complementary

#5B66E3 #E3945B #AAE35B

monochromatic

#1D28A7 #2735DA #5B66E3 #8F97EC #C4C8F5

Accessibility & contrast

On white

4.71

#5B66E3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#5B66E3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66E3

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66E3	#FFFFFF	#000000	##FFFFFF
##5B66E3	1.00	4.71	4.45	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0079E7

Deuteranopia (green-blind)

#006EE0

Tritanopia (blue-blind)

#00849B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5b66e3;
/* rgb */ color: rgb(91, 102, 227);
/* oklch */ color: oklch(57.0% 0.187 275.0);

Tailwind

colors: {
  custom: {
    50: '#9591ed',
    500: '#5b66e3',
    950: '#000000',
  },
}

SCSS

$custom: #5b66e3;
$custom-light: #9591ed;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66e3",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 227
  },
  "hsl": {
    "h": 235.147,
    "s": 70.833,
    "l": 62.353
  },
  "oklch": {
    "l": 0.56978,
    "c": 0.18749,
    "h": 275
  },
  "luminance": 0.17273
}

Semantic roles & 50–950 ramp

primary

#5B66E3

secondary

#E6E2B4

accent

#C313D3

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5B66E3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →